I’m starting to think we’re talking past each other. Your last paragraph seems to imply that legacy systems were more approachable for a newbie to debug. If that’s your point I wholeheartedly agree. It’s not that hard as long as you get over the fear of fucking something up.

I do agree that juniors had an easier time learning on legacy systems, and that’s been true since the dawn of technology. Things get more complicated, and thus harder to get a deep understanding of, the more time passes. It’s a lot easier to understand older and simpler technology.

I’m a little confused why you seem to be arguing both that the issues I mentioned are easy to google, while at the same time saying newbies never get a chance to debug them. Surely, if it’s so easy, the newbie can take a stab at it?

Personally, I like to let the newbies have a stab at non-urgent issues first, and nudging them if they get stuck. They may not be able to solve the problem solo, but they know a lot more about how the system works afterwards anyway.